led紫外線燈的原理_LED燈泡的原理 |
發布時間:2022-06-09 15:06:01 |
深(shen)紫(zi)外(wai)(wai)發(fa)光二(er)極管(guan)(guan)燈泡(pao)的(de)(de)(de)(de)原理(li)(li)和(he)(he)特征:1。深(shen)紫(zi)外(wai)(wai)發(fa)光二(er)極管(guan)(guan)燈泡(pao)的(de)(de)(de)(de)發(fa)光機構:pN結端的(de)(de)(de)(de)電壓構成一定(ding)的(de)(de)(de)(de)屏障,加上(shang)正向偏置電壓,屏障降低,p區域和(he)(he)N區域的(de)(de)(de)(de)載(zai)波的(de)(de)(de)(de)大部分(fen)(fen)分(fen)(fen)散在對方身上(shang)。由(you)于(yu)電子遷移(yi)率(lv)遠大于(yu)空穴(xue)遷移(yi)率(lv),大量(liang)(liang)電子分(fen)(fen)散在p區域,構成p區域少量(liang)(liang)載(zai)體的(de)(de)(de)(de)執筆。這(zhe)(zhe)些電子和(he)(he)價帶(dai)的(de)(de)(de)(de)腔(qiang)復合通過光能(neng)法釋放復合時(shi)獲得(de)的(de)(de)(de)(de)能(neng)量(liang)(liang)。這(zhe)(zhe)是pN結發(fa)光的(de)(de)(de)(de)原理(li)(li)。深(shen)紫(zi)外(wai)(wai)LED燈泡(pao)光源硬化設備(bei)、深(shen)紫(zi)外(wai)(wai)LED燈泡(pao)光源硬化設備(bei)。 2.深紫外(wai)LED燈泡發(fa)光(guang)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv):通(tong)(tong)常(chang)稱為(wei)組(zu)件(jian)(jian)(jian)(jian)(jian)的(de)(de)(de)外(wai)部(bu)(bu)(bu)量(liang)(liang)(liang)子(zi)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv),是組(zu)合(he)件(jian)(jian)(jian)(jian)(jian)內(nei)(nei)(nei)(nei)(nei)部(bu)(bu)(bu)量(liang)(liang)(liang)子(zi)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv)和組(zu)合(he)件(jian)(jian)(jian)(jian)(jian)取(qu)出功(gong)(gong)(gong)(gong)率(lv)(lv)(lv)的(de)(de)(de)乘積(ji)(ji)。組(zu)件(jian)(jian)(jian)(jian)(jian)的(de)(de)(de)內(nei)(nei)(nei)(nei)(nei)部(bu)(bu)(bu)量(liang)(liang)(liang)子(zi)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv)原本(ben)是組(zu)件(jian)(jian)(jian)(jian)(jian)本(ben)身(shen)的(de)(de)(de)電光(guang)轉換功(gong)(gong)(gong)(gong)率(lv)(lv)(lv),主(zhu)要與組(zu)件(jian)(jian)(jian)(jian)(jian)本(ben)身(shen)的(de)(de)(de)特性(例如,組(zu)件(jian)(jian)(jian)(jian)(jian)資(zi)料的(de)(de)(de)帶,缺點,雜質),組(zu)件(jian)(jian)(jian)(jian)(jian)的(de)(de)(de)阻擋(dang)結(jie)構(gou),結(jie)構(gou)等有關。組(zu)件(jian)(jian)(jian)(jian)(jian)的(de)(de)(de)提(ti)(ti)取(qu)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv)是指在組(zu)件(jian)(jian)(jian)(jian)(jian)內(nei)(nei)(nei)(nei)(nei)部(bu)(bu)(bu)產生的(de)(de)(de)光(guang)子(zi),其(qi)通(tong)(tong)過(guo)組(zu)件(jian)(jian)(jian)(jian)(jian)本(ben)身(shen)的(de)(de)(de)吸收、折(zhe)射、反射來實踐組(zu)件(jian)(jian)(jian)(jian)(jian)外(wai)部(bu)(bu)(bu)可測量(liang)(liang)(liang)的(de)(de)(de)光(guang)子(zi)的(de)(de)(de)數量(liang)(liang)(liang)。因此(ci),提(ti)(ti)取(qu)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv)的(de)(de)(de)因素包括部(bu)(bu)(bu)件(jian)(jian)(jian)(jian)(jian)資(zi)料本(ben)身(shen)的(de)(de)(de)吸收、部(bu)(bu)(bu)件(jian)(jian)(jian)(jian)(jian)的(de)(de)(de)幾(ji)個結(jie)構(gou)、部(bu)(bu)(bu)件(jian)(jian)(jian)(jian)(jian)和包裝(zhuang)資(zi)料的(de)(de)(de)折(zhe)射率(lv)(lv)(lv)差、部(bu)(bu)(bu)件(jian)(jian)(jian)(jian)(jian)結(jie)構(gou)的(de)(de)(de)散射特性等。組(zu)件(jian)(jian)(jian)(jian)(jian)內(nei)(nei)(nei)(nei)(nei)部(bu)(bu)(bu)的(de)(de)(de)量(liang)(liang)(liang)子(zi)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv)和組(zu)件(jian)(jian)(jian)(jian)(jian)取(qu)出功(gong)(gong)(gong)(gong)率(lv)(lv)(lv)的(de)(de)(de)乘積(ji)(ji)是整個組(zu)件(jian)(jian)(jian)(jian)(jian)的(de)(de)(de)發(fa)光(guang)作用(yong),即組(zu)件(jian)(jian)(jian)(jian)(jian)外(wai)部(bu)(bu)(bu)的(de)(de)(de)量(liang)(liang)(liang)子(zi)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv)。初(chu)始組(zu)件(jian)(jian)(jian)(jian)(jian)展開集(ji)中于提(ti)(ti)高其(qi)內(nei)(nei)(nei)(nei)(nei)部(bu)(bu)(bu)量(liang)(liang)(liang)子(zi)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv),主(zhu)要方法(fa)是通(tong)(tong)過(guo)提(ti)(ti)高屏(ping)障(zhang)質量(liang)(liang)(liang)和屏(ping)障(zhang)結(jie)構(gou)的(de)(de)(de)變化(hua),難以將電能轉換為(wei)熱(re)能,直(zhi)接(jie)提(ti)(ti)高深紫外(wai)LED燈泡的(de)(de)(de)發(fa)光(guang)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv),獲得70%配置的(de)(de)(de)理論內(nei)(nei)(nei)(nei)(nei)部(bu)(bu)(bu)量(liang)(liang)(liang)子(zi)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv)。在這種情況下,僅僅提(ti)(ti)高組(zu)件(jian)(jian)(jian)(jian)(jian)的(de)(de)(de)內(nei)(nei)(nei)(nei)(nei)部(bu)(bu)(bu)量(liang)(liang)(liang)子(zi)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv)不能提(ti)(ti)高組(zu)件(jian)(jian)(jian)(jian)(jian)的(de)(de)(de)總光(guang)量(liang)(liang)(liang)。因此(ci),提(ti)(ti)高組(zu)件(jian)(jian)(jian)(jian)(jian)的(de)(de)(de)提(ti)(ti)取(qu)功(gong)(gong)(gong)(gong)率(lv)(lv)(lv)是第一個研究課題(ti)。目前的(de)(de)(de)方法(fa)主(zhu)要是改變顆粒(li)形狀?Ip結(jie)構(gou),外(wai)觀粗(cu)糙(cao)化(hua)技能。 3、深紫(zi)外(wai)LED燈泡(pao)的(de)(de)(de)(de)電(dian)氣特(te)(te)性:電(dian)流控制(zhi)型(xing)設備(bei),負荷特(te)(te)性與pN結(jie)的(de)(de)(de)(de)UI曲線相似,正(zheng)導(dao)(dao)通電(dian)壓(ya)的(de)(de)(de)(de)最小變化(hua)導(dao)(dao)致(zhi)正(zheng)導(dao)(dao)通電(dian)流的(de)(de)(de)(de)大變化(hua)(指數等級),逆(ni)導(dao)(dao)通電(dian)流小,逆(ni)導(dao)(dao)通電(dian)壓(ya)。在實踐性的(de)(de)(de)(de)使用中,必須選擇。深紫(zi)外(wai)發光二極管(guan)珠的(de)(de)(de)(de)正(zheng)向電(dian)壓(ya)隨著(zhu)溫(wen)(wen)度的(de)(de)(de)(de)增加而減小,并且具有負溫(wen)(wen)度系數。我們的(de)(de)(de)(de)需(xu)求是,深紫(zi)外(wai)LED燈泡(pao)消耗電(dian)力,一部分成為光能。剩下的(de)(de)(de)(de)成為熱(re)能,加上結(jie)溫(wen)(wen)。放出的(de)(de)(de)(de)熱(re)(功率)可以表示。 4、深紫(zi)(zi)外(wai)LED燈(deng)泡(pao)的(de)(de)光(guang)學特性:深紫(zi)(zi)外(wai)LED燈(deng)泡(pao)供給半(ban)(ban)幅大的(de)(de)單(dan)色光(guang),半(ban)(ban)導體的(de)(de)間隙隨(sui)著(zhu)(zhu)溫(wen)度(du)(du)的(de)(de)上(shang)升而減(jian)少,所以發光(guang)的(de)(de)峰值波(bo)長隨(sui)著(zhu)(zhu)溫(wen)度(du)(du)的(de)(de)上(shang)升而增(zeng)加,即光(guang)譜紅(hong)移動(dong),溫(wen)度(du)(du)系數為(wei)+2~3A/。深紫(zi)(zi)外(wai)LED燈(deng)泡(pao)的(de)(de)發光(guang)亮(liang)度(du)(du)L和正(zheng)向(xiang)電流(liu)。電流(liu)增(zeng)加,發光(guang)亮(liang)度(du)(du)也同樣增(zeng)加。其他發光(guang)亮(liang)度(du)(du)也與(yu)環境溫(wen)度(du)(du)有關,環境溫(wen)度(du)(du)高時(shi)復(fu)合功率降低(di),發光(guang)強度(du)(du)降低(di)。 5、深紫外LED燈(deng)泡的熱(re)特(te)(te)性(xing):小(xiao)電流(liu)下,LED溫(wen)度(du)上升(sheng)不(bu)明顯(xian)。環境溫(wen)度(du)高的話(hua),深紫外LED燈(deng)泡的主波長變(bian)紅,亮(liang)度(du)降低(di),發光均勻性(xing),一致(zhi)性(xing)差。特(te)(te)殊點(dian)矩(ju)陣、大型顯(xian)示(shi)器(qi)的溫(wen)度(du)上升(sheng)對LED可(ke)靠性(xing)、穩定性(xing)的影響(xiang)更為顯(xian)著。散熱(re)計(ji)劃(hua)很(hen)重要。 6、深紫(zi)(zi)(zi)外(wai)(wai)(wai)LED燈泡(pao)壽(shou)(shou)命(ming)數:深紫(zi)(zi)(zi)外(wai)(wai)(wai)LED燈泡(pao)的長期工作導致光(guang)老(lao)化,特別是對于大功率深紫(zi)(zi)(zi)外(wai)(wai)(wai)LED燈泡(pao)來(lai)(lai)說,光(guang)老(lao)化的疑問更加嚴(yan)重。在測量深紫(zi)(zi)(zi)外(wai)(wai)(wai)線LED燈泡(pao)的壽(shou)(shou)命(ming)數時,僅(jin)將燈的損壞(huai)作為深紫(zi)(zi)(zi)外(wai)(wai)(wai)線LED燈泡(pao)的壽(shou)(shou)命(ming)數的終點是不(bu)夠的,并且(qie)以深紫(zi)(zi)(zi)外(wai)(wai)(wai)線LED燈泡(pao)的光(guang)衰減比例(li)來(lai)(lai)規定(ding)LED的壽(shou)(shou)命(ming)數,例(li)如35%是有(you)意義的。 7、大功率深紫外LED燈泡包裝:首(shou)先考慮散熱和發光。在散熱方(fang)面(mian),鋁基散熱器(qi)通過銅基散熱器(qi)連接,在顆粒(li)和散熱器(qi)之(zhi)間(jian)用(yong)錫片焊接連接,該散熱方(fang)法作(zuo)用(yong)好(hao),性價比高(gao)。在發光方(fang)面(mian)選擇芯片背(bei)技,在底(di)面(mian)和側面(mian)添加反射(she)面(mian)反射(she)破壞(huai)的(de)光能(neng),可以得到更多的(de)發光。 |